Lamp for liquid hydrocarbons.



H. SELIGMANN.

LAMP FOR LIQUID HYDRO CARBONS.

APPLICATION FILED APR.23,1913.

1, 1 46,352 Patented July 13, 1915.

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HENRY SELIGMANN, or rnANKroanon-rnn-Mam, GERMANY, assienoa To run FIRM or CONTINENTAL-LICHT-- UNI) APPABATEBAU-GES-ELLSGHAFT in. B. n, or

FRANKFOBT-ON-THE-MAIN, GERMANY.

LAMP FOB. LIQUID I-IYDROGARBONS.

Application filed April 28, 1913.

To all whom it may concern Be it known that I, HENRY SELIGMANN, a sub ect of the Emperor of Germany, re-

siding at Beethovenstrasse 9, Frankfort-on-- following to be a full, clear, and exact de scription of the invention, such as will enable others skilled in the art to which it appertains' to make and use the same, ref-' erence being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

This invention relates to a lamp for liquid hydrocarbons and m partlcular to a gravity feed lamp of this kind.

Hitherto the cross-section of the vaporizer in such lamps have been made the same throughout the whole of its length. This however had the drawback that in the event of large oscillations of the lamp, being caused for instance by wind, the lamp was put out. This reason was not discovered at once, and only after careful experiments, it

has been found that the uniform cross-see tion of the vaporizer was the sole reason of the dlsturbances 1n question.

When the lamp oscillates, more particu-v larly in cases where the vaporizerjoccupies 1n the lamp a position in which its surface is not horizontal, that is to say, is obhque,

the liquid fuel, in the case of oscillation of the lamp toward the side of the vaporizer, gets into the vapor or superheater chamber, and the next moment, that is to say, when the lamp swings back, said fuel flows back. In that case it acts as a hydraulic ram and produces in the vaporand superheater chamber a vacuum action, by which the" flame is extinguished. This drawback is obviated according to this invention by giving the portion of the oblique vaporizer projecting into the discharge chamber for the combustion gases and inclosing the vaporor superheater chamber, a widened crosssection, which prevents the liquid fuel from acting as a hydraulic ram, in the case of oscillation of the lamp, so that the latter is not put out. In order further to insure a stronger heating of the widened vaporizer part projecting into the discharge chamber, the screen at the point where the vaporizer Specification of Letters Patent.

Patented July 13, 1915.

Serial No. 763,135.

joins it, has a widened portion which enables thc escaping combustion gases to come into contact with the said vaporizer part as far as possible on all sides.

A construction according to this invention is illustrated by way of example in the accompanying drawing in which Figure 1 shows the lamp in vertical section, Fig. 2 is section through the lamp on line AB of Fig. 1.

The lamp illustrated comprises a casing 1 surrounded at its upper part by the fuel tank 2 and carrying at the bottom part the screen '3 with the preliminary heating cup 4:.

. To the screen 3 is suspended, by means of the supporting ring 5, a glass bell 6. In the bottom part of the lamp casing there is further arranged also the vaporizer 7 constituted by an oblique tube projecting with its front higher end into the screen 3 and having at the said end a widened cross-section 7 of the shape shown in Fig. 1. At the point where the vaporizer projects into the screen, the latter is provided with a widened portion 8 which, in its turn,.carries a connection branch 9. On the connection branch 9 the discharge chimney 10 is placed, which is carried from the branch upward in an oblique direction, with the same round (or'oval) cross-section, in the lamp casing and is used for discharging and guiding the combustion products.

From the'part 7 of the vaporizer a tube 11 used as a superheater, extends upward in the chimney 10. At the level of the bottom of the tank 2, the tube in question is bent back and again carried downward within the chimney. At its lower end situated within the screen 3, it carries a fuel disf'charging nozzle 12 projecting at the top from the screen 3. The centrally arranged tion 8, the preliminary heating cup and the branch 9. The fuel tank 2 is connected through the fuel supply pipe 26 with the vaporizer 7.

The working of the lamp hereinbefore described and illustrated is as follows: In

the known manner, by lighting the fuel contained in the preliminary heating cup 4, the preliminary heat required for heating the vaporizer 7 and the superheater 11, is produced. The fuel vapors generated in the portion 7 of the vaporizer and passing through the superheater 11, on escaping from the nozzle 12, become mixed with the air, and the mixture passes through the burner pipe 13 to the burner and the incandescent mantle where it burns as a flame. The combustion gases are then caught up by the deflector screen 8 and guided to the chimney 10 through which the gases escape upward, and on their way they heat the fuel contained in the vaporizer part 7 the fuel vapors contained in the superheater.

The construction and arrangement of the vaporizer hereinbefore descibed and illustrated, make it possible to keep a large portion of the vaporizer, in which settle the residues of gasification, in the form of a straight line, for the purpose of facilitating the cleaning. Moreover in case of oscillations of the lamp it prevents owing to the widened crosssection at 7, the production of hydraulic suction in the evaporating and superheater chamber and in that way prevents the lamp from being extinguished, for even when the lamp is in a strongly oblique position, the fuel contained in the vaporizer will never fill completely the widened part 7 of the same, so that in that part it can never act as a hydraulic piston. Owing to the uniform cross-section of the chimney, the best draft and, in connection with the widened portion 8 on the screen, the most favorable and strongest heating of the vaporizer at a point where it passes through the screen, are insured. Moreover, the oblique arrangement of the chimney avoids resistances such as occur when curved chimneys with connection pieces are used, and it also avoids any reduction of speed of the escaping combustion gases, such as take place in chimneys with widened portions. Owing to the chimney 10 being arranged close to the mixing tube 13, the transmission of the greatest possible amount of heat from the gases escaping through the chimney, to the said tube, is insured, and also a greater heating of the gas mixture after its entrance into the mixing tube.

What I claim is:

1. A lamp for burning liquid fuel comprising an inverted incandescent body to which the liquid is fed by gravity, a lamp casing, a chimney arranged inside said casing, a screen deflecting the combustion gases and supporting the chimney, an oblique vaporizer having a widened upper portion projecting into the screen at the lower end of the chimney, substantially as described and as illustrated.

2. A lamp for burning liquid fuel comprising an inverted incandescent body to which the liquid is fed by gravity, a lamp casing, a chimney diagonally arranged in said lamp casing, a deflector screen having a connection branch for the chimney and placed at the upper part and outside the center of the screen, an oblique vaporizer having a widened upper portion projecting into the connection branch of the screen, substantially as described and as illustrated.

3. A lamp for burning liquid fuel comprising an inverted incandescent body to which the liquid is fed by gravity, a lamp casing, a chimney diagonally arranged in said casing, a deflector screen having a connection branch for the chimney, a widened portion disposed outside the central part of he screen and carrying the connection branch, an oblique vaporizer having a widened upper portion projecting into the connection branch for the chimney, the lat ter passing close to a central mixing tube to transmit the heat of the gases to this tube for heating the gas-mixture after its entrance in this tube, substantially as described and as illustrated.

In testimony that I claim the foregoing as my invention, 1 have signed my name in presence of two subscribing witnesses.

HENRY SELIGMANN.

"Witnesses JEAN GRUND, CARL GRUND.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washingtonfl). G. 

